Move MIDI code to hang off WebFrame.

public/web/WebFrameClient.h

 /*
  * Copyright (C) 2011, 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 49 matching lines @@
 class WebColorChooserClient;
 class WebContentDecryptionModule;
 class WebCookieJar;
 class WebDataSource;
 class WebDOMEvent;
 class WebFormElement;
 class WebGeolocationClient;
 class WebInputEvent;
 class WebMediaPlayer;
 class WebMediaPlayerClient;
+class WebMIDIClient;
 class WebNotificationPresenter;
 class WebServiceWorkerProvider;
 class WebServiceWorkerProviderClient;
 class WebSocketHandle;
 class WebNode;
 class WebPlugin;
 class WebRTCPeerConnectionHandler;
 class WebSharedWorker;
 class WebSharedWorkerClient;
 class WebSocketStreamHandle;
@@ skipping 377 matching lines @@
 
 
     // MediaStream -----------------------------------------------------
 
     // A new WebRTCPeerConnectionHandler is created.
     virtual void willStartUsingPeerConnectionHandler(WebLocalFrame*, WebRTCPeerConnectionHandler*) { }
 
     virtual WebUserMediaClient* userMediaClient() { return 0; }
 
 
+    // Web MIDI -------------------------------------------------------------
+
+    virtual WebMIDIClient* webMIDIClient() { return 0; }
+
+
     // Messages ------------------------------------------------------
 
     // Notifies the embedder that a postMessage was issued on this frame, and
     // gives the embedder a chance to handle it instead of WebKit. Returns true
     // if the embedder handled it.
     virtual bool willCheckAndDispatchMessageEvent(
         WebLocalFrame* sourceFrame,
         WebFrame* targetFrame,
         WebSecurityOrigin target,
         WebDOMMessageEvent event) { return false; }
@@ skipping 28 matching lines @@
     // Send initial drawing parameters to a child frame that is being rendered out of process.
     virtual void initializeChildFrame(const WebRect& frameRect, float scaleFactor) { }
 
 protected:
     ~WebFrameClient() { }
 };
 
 } // namespace blink
 
 #endif